Trachichthys australis

Trachichthys australis
Trachichthys australis, Sydney, NSW, Photo: Andrew Green
Trachichthys australis
Trachichthys australis, Jervis Bay, NSW, Photo: Andrew Green
Trachichthys australis
Trachichthys australis, NSW, Australia, Photo: Ian Shaw
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Trachichthys australis
Trachichthys australis
Trachichthys australis

Similar Species


Temperate Australasia


Rounded body, reddish brown colour, and white and dark markings on opercles and fins. It is occasionally caught by line. The species releases a toxic white substance through pores in the skin as a defensive measure when captured.


Max Size: 15 cm

Sea Temperature Range: 12.3-23.5°C

Depth: 1–30 m

Habitat Generalization Index: 2.61

Also referred to as the SGI (Species Generalisation Index), this describes the habitat niche breadth of the species. Species with values less than 15 are found in a relatively narrow range of reef habitat types (specialists), while those over 25 may be found on most hard substrates within their range (generalists). Learn more here.

Conservation and Rarity

IUCN Status: Not Evaluated

Occurrence: Frequent (10.8% of sites)

Occurrence describes how often the species is found on surveys within its distribution. It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed

Abundance: Few (2 per transect)

Abundance is calculated as the average number of individuals recorded per RLS transect, where present.

Edit by: GJ Edgar. 2008. Australian Marine Life. New Holland, Sydney